Sixteen buses were heavily damaged in the blaze early Sunday at a bus yard. Six others suffered minor damage.
Fresno fire spokesman Koby Johns says the cause of the blaze is still under investigation.
The buses carry special education students for the Fresno Unified School District. They are provided through a contract with an outside company.
Fresno school spokeswoman Susan Bedi tells the Fresno Bee (http://bit.ly/Vyyshp) the contractor has assured the district that bus service will not be interrupted. Students are on winter break until Jan. 14.